Why do we need Vgt?

MorganY · Feb 28, 2012

Tuning is key. I love my non-VGT.

strokin6L · Feb 28, 2012

if you were to add a non vgt turbo to a truck....you'll need a tune so that it wont throw a CEL or you'll just hafta take out the VGT solenoid, split it in two pieces and mount the the larger piece and plug the harness back into it. This will fool the PCM to think that the stock vgt turbo is still being used. Only other reason you'll need a tune is so that you can add some fuel down low to help spool the turbo a little. You're not tuning the turbo...you're adding fuel to make it spool. Other than that a non vgt turbo will work awesome.

smokedout250 · Feb 28, 2012

So if one desired to run a small injector and a non Vgt it would be simple as tuning tweaks to allow more fuel down in the rpms to make your turbo light fast?

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Keanoknick · Feb 28, 2012

smokedout250 said:
So if one desired to run a small injector and a non Vgt it would be simple as tuning tweaks to allow more fuel down in the rpms to make your turbo light fast?

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It is also very important to size the turbo appropriatley. You can't just slap any old non-vgt turbo on there and expect it to work.

smokedout250 · Feb 28, 2012

Okay then how do you size it properly? How do figure weather to waste gate or not?

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strokin6L · Feb 28, 2012

i don't have a wastegate on mine because i'm not spraying it. Boost and backpressure ratio is very good. You wont need a wastegate as long your boost and BP ratio stays close to 1:1

Silverback · Feb 28, 2012

There are plenty of proven setups for every application, if I were you I'd just contact one of our site sponsors and let them know what you want to do then go from there. If your wanting a mild setup with great street manners a 62/65/70 with stock sticks or 155s would do the trick, with tuning and proper supporting mods of course.

I have 190s and a powermax-ssx. The truck drives like stock and runs like a scalded dog. I stuck with the vgt because I wanted the simplicity of a drop in turbo, no new pedestal, adapater flange, oil lines, etc required.

Atsah · Feb 28, 2012

MUDSTROKIN' said:
It isnt a must, plenty of guys running non vgts.

If you use your truck what it's intended for (work) and you keep up with your maintenance the veins shouldn't have any problems

Exactly..

smokedout250 · Feb 28, 2012

Well im not planing on doing anything anytime soon! I was just trying to get some input on the subject thanks for the info guys!!!

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Lubbockguy1979 · Feb 28, 2012

My logical take on this is, the vgt was introduced for emission and fuel mpg improvement. That is why every major brand has them Also it has benifits of acting like a smaller turbo from a dead stop and a larger turbo once it spools. That does a few things. it makes the truck more responsive and potentially draws in non diesel drivers by it driving like a gas engine. as well as making the truck feel more powerful. Twin/ 2 turbos would be better for acceleration and power with more fuel but with the hp race the big 3 were in they are not going to put out a 500-600 rwhp truck at least not in the era the 6.0 was built. Remember more power leads to more failed components. Also figure in cost. Why is it ford didn't do twins after the 6.4? I would bet cost. They also reined in the fuel because to much power was on the table with the 6.4. Obviously ford wants to be competative but they are looking at a lot more that hp from a truck. They have epa, cafe and warranty to worry about.

Now as we have read the non vgt will work. The stock turbo is plenty for the stock sticks and adding a non vgt turbo may change how and when the truck makes the power but I wouldn't expect a big increase. I know with 155cc injectors and a 64mm turbo 500rwhp is possible. The biggest issue would be towing when talking about a non vgt. A large vgt has the potential to tow given the ability to better manage your egts with larger sticks. There are still limits to what you could do with a single and tow though.

smokedout250 · Feb 28, 2012

Lubbockguy1979 said:
My logical take on this is, the vgt was introduced for emission and fuel mpg improvement. That is why every major brand has them Also it has benifits of acting like a smaller turbo from a dead stop and a larger turbo once it spools. That does a few things. it makes the truck more responsive and potentially draws in non diesel drivers by it driving like a gas engine. as well as making the truck feel more powerful. Twin/ 2 turbos would be better for acceleration and power with more fuel but with the hp race the big 3 were in they are not going to put out a 500-600 rwhp truck at least not in the era the 6.0 was built. Remember more power leads to more failed components. Also figure in cost. Why is it ford didn't do twins after the 6.4? I would bet cost. They also reined in the fuel because to much power was on the table with the 6.4. Obviously ford wants to be competative but they are looking at a lot more that hp from a truck. They have epa, cafe and warranty to worry about.

Now as we have read the non vgt will work. The stock turbo is plenty for the stock sticks and adding a non vgt turbo may change how and when the truck makes the power but I wouldn't expect a big increase. I know with 155cc injectors and a 64mm turbo 500rwhp is possible. The biggest issue would be towing when talking about a non vgt. A large vgt has the potential to tow given the ability to better manage your egts with larger sticks. There are still limits to what you could do with a single and tow though.

Thank you! That's alot of what I was looking for right there!

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